The calculated distance (air line) between Sv. Trojica v Slov. Goricah and Kamnik is approximately 65 miles respectively 105 kilometers.
By car or train, the actual journey to Kamnik is certainly longer, as only the direct route (as the crow flies) between Sv. Trojica v Slov. Goricah and Kamnik has been calculated here.
Air line (approximately)
105 kilometers
56 nautical miles